<template>
    <div>
      <el-radio-group v-model="isCollapse" style="margin-bottom: 20px">
        <el-radio-button :label="false">展开</el-radio-button>
        <el-radio-button :label="true">收起</el-radio-button>
      </el-radio-group>
      <el-menu
        default-active="1-4-1"
        class="el-menu-vertical-demo"
        @open="handleOpen"
        @close="handleClose"
        :collapse="isCollapse"
        router="true"
      >
        <el-submenu index="1">
          <template slot="title">
            <i class="el-icon-location"></i>
            <span slot="title">系统管理</span>
          </template>
          <el-menu-item-group>
            <span slot="title">用户管理</span>
            <el-menu-item index="manager">用户信息</el-menu-item>
            <el-menu-item index="role">角色信息</el-menu-item>
            <el-menu-item index="perm">权限信息</el-menu-item>
          </el-menu-item-group>
          <el-menu-item-group title="系统配置">
            <el-menu-item index="1-3">管理员配置</el-menu-item>
          </el-menu-item-group>
          <el-submenu index="1-4">
            <span slot="title">一级菜单</span>
            <el-menu-item index="1-4-1">二级菜单</el-menu-item>
          </el-submenu>
        </el-submenu>
        <el-menu-item index="2">
          <i class="el-icon-menu"></i>
          <span slot="title">支付管理</span>
        </el-menu-item>
        <el-menu-item index="3">
          <i class="el-icon-setting"></i>
          <span slot="title">开学管理</span>
        </el-menu-item>
      </el-menu>
    </div>
  </template>
  
  <script>
    export default {
      data() {
        return {
          isCollapse: true,
        };
      },
      methods: {
        handleOpen(key, keyPath) {
          console.log(key, keyPath);
        },
        handleClose(key, keyPath) {
          console.log(key, keyPath);
        },
      },
    };
  </script>
  
  <style>
  .el-menu-vertical-demo:not(.el-menu--collapse) {
    width: 200px;
    min-height: 400px;
  }
  </style>